Answer: Respiration rate in corn seed will become high as compared to barley seed.
Explanation:
After a seed get separated from the plant, it undergoes through a resting period called as dormancy. The seed metabolizes the available stored form of energy reserve very slowly. The metabolic source is a stored form of potential energy in the seed. The cellular respiration is a process in which the available food is oxidized to produce energy. The seed in the dormant stage also performs cellular respiration to stay alive but at low rate. The respiration rate will be more in seeds that exhibit non-metabolic active storage material like fat or protein as the seed will require more oxygen for it's break down.
The corn seed exhibit the non-metabolically active storage material thus the rate of respiration will be high as compared to barley.